000 00311nam a2200121Ia 4500
008 160509s9999 xx 000 0 und d
020 _a0028-0836
100 _aNature
245 _aNature : 1989 : Volume 337(Jan-Feb) : Shelf 15.4
260 _bNature Publishing Group
_c1989
300 _a756p.
650 _aNature
999 _c4931
_d4931